§ 27.1310   Protection of Broadcast Television Service in the 600 MHz band
from wireless operations.

   (a) Licensees authorized to operate wireless services in the 600 MHz
   band must cause no harmful interference to public reception of the
   signals of broadcast television stations transmitting co-channel or on
   an adjacent channel.

   (1) Such wireless operations must comply with the D/U ratios in Table 5
   in OET Bulletin No. 74, Methodology for Predicting Inter-Service
   Interference to Broadcast Television from Mobile Wireless Broadband
   Services in the UHF Band ([DATE]) (“OET Bulletin No. 74”). Copies of
   OET Bulletin No. 74 may be inspected during normal business hours at
   the Federal Communications Commission, 445 12th St. SW., Dockets Branch
   (Room CY A09257), Washington, DC 20554. This document is also available
   through the Internet on the FCC Home Page at http://www.fcc.gov.

   (2) If a 600 MHz band licensee causes harmful interference within the
   noise-limited contour or protected contour of a broadcast television
   station that is operating co-channel or on an adjacent channel, the 600
   MHz band licensee must eliminate the harmful interference.

   (b) A licensee authorized to operate wireless services in the 600 MHz
   downlink band:

   (1) Is not permitted to deploy wireless base stations within the
   noise-limited contour or protected contour of a broadcast television
   station licensed on a co-channel or adjacent channel in the 600 MHz
   downlink band;

   (2) Is required to perform an interference study using the methodology
   in OET Bulletin No. 74 before deploying or operating wireless base
   stations within the culling distances specified in Tables 7-12 of OET
   Bulletin No. 74 from the noise-limited contour or protected contour of
   such a broadcast television station;

   (3) Is required to perform an interference study using the methodology
   in OET Bulletin No. 74 when modifying a base station within the culling
   distances in Tables 7-12 of OET Bulletin 74 that results in an increase
   in energy in the direction of co-channel or adjacent channel broadcast
   television station's contours;

   (4) Is required to maintain records of the latest OET Bulletin No. 74
   study for each base station and make them available for inspection to
   the Commission and, upon a claim of harmful interference, to the
   requesting broadcasting television station.

   (c) A licensee authorized to operate wireless services in the 600 MHz
   uplink band must limit its service area so that mobile and portable
   devices do not transmit:

   (1) Co-channel or adjacent channel to a broadcast television station
   within that station's noise-limited contour or protected contour;

   (2) Co-channel to a broadcast television station within five kilometers
   of that station's noise-limited contour or protected contour; and

   (3) Adjacent channel to a broadcast television station within 500
   meters of that station's noise-limited contour or protected contour.

   (d) For purposes of this section, the following definitions apply:

   (1) Broadcast television station is defined pursuant to § 73.3700(a)(1)
   of this chapter;

   (2) Noise-limited contour is defined to be the full power station's
   noise-limited contour pursuant to § 73.622(e);

   (3) Protected contour is defined to be a Class A television station's
   protected contour as specified in section 73.6010;

   (4) Co-channel operations in the 600 MHz band are defined as operations
   of broadcast television stations and wireless services where their
   assigned channels or frequencies spectrally overlap;

   (5) Adjacent channel operations are defined as operations of broadcast
   television stations and wireless services where their assigned channels
   or frequencies spectrally abut each other or are separated by up to 5
   MHz.

   [ 80 FR 71743 , Nov. 17, 2015]

   Effective Date Note: At  80 FR 71743 , Nov. 17, 2015, § 27.1310 was added.
   This text contains information collection and recordkeeping
   requirements and will not become effective until approval has been
   given by the Office of Management and Budget.

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Coordination/Notification Requirements

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